<template>
  <div>
    <!--面包屑导航区域-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item :to="{path: '/goods'}">商品列表</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!--卡片视图区域-->
    <el-card class="box-card">
      <!--提示区域-->
      <el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>
      <!--步骤条区域  -0 为字符串转数字-->
      <el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!--  Tab区域-->
      <el-form :model="addForm" :rules="formRules" ref="ruleFormRef"
               label-width="100px" label-position="top">
        <el-tabs v-model="activeIndex" :tab-position="'left'"
                 :before-leave="beforeTableave" @tab-click="tabClicked">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name" autocomplete="off"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number" autocomplete="off"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" autocomplete="off"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number" autocomplete="off"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <!-- 商品分类的级联选择框 -->
              <el-cascader
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="cateProps"
                prop="goods_cat"
                @change="handleChange"
                style="width: 40%"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!--  渲染表单的Item项-->
            <el-form-item v-for="item in manyTableData" :key="item.attr_id" :label="item.attr_name">
              <!--复选框组-->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox v-for="(cb,i) in item.attr_vals" :key="i" :label="cb" border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTableData"
                          :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!--action 表示图片要上传到后台API地址-->
            <el-upload
              :action="uploadUrl"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              :headers="headerObj"
              :on-success="handleSuccess"
              list-type="picture">
              <el-button size="small" type="primary">点击上传</el-button>
              <!--<div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>-->
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!--  富文本编辑器-->
            <quill-editor v-model="addForm.goods_introduce">
            </quill-editor>
            <!--添加商品按钮-->
            <el-button type="primary" style="margin-top: 15px" @click="addGoods">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!--图片预览-->
    <el-dialog
      title=" 图片预览
            "
      :visible.sync="previewVisible"
      width="50%">
      <img :src="previewPath" alt="" class="previewImg">
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'

export default {
  name: 'Add',
  data () {
    return {
      // 步骤条当前激活索引
      activeIndex: '0',
      //  添加商品表单对象
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        // 商品所属的分类数组
        goods_cat: [],
        //  图片的数组
        pics: [],
        // 商品的详情元素
        goods_introduce: '',
        attrs: []
      },
      // 商品分类列表
      cateList: [],
      //   级联选择框的配置对象
      cateProps: {
        expandTrigger: 'hover',
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      // 动态参数列表
      manyTableData: [],
      // 静态属性列表
      onlyTableData: [],
      // 上传图片的URL地址
      uploadUrl: this.$http.defaults.baseURL + 'upload',
      // 设置上传路径的请求头
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      // 图片预览地址
      previewPath: '',
      // 控制显不与隐藏预览对话框
      previewVisible: false,
      //  表单的验证规则
      formRules: {
        goods_name: [{
          required: true,
          message: '请输入商品名称',
          trigger: 'blur'
        }],
        goods_price: [{
          required: true,
          message: '请输入商品价格',
          trigger: 'blur'
        }],
        goods_weight: [{
          required: true,
          message: '请输入商品重量',
          trigger: 'blur'
        }],
        goods_number: [{
          required: true,
          message: '请输入商品数量',
          trigger: 'blur'
        }],
        goods_cat: [{
          required: true,
          message: '请选择商品分类',
          trigger: 'blur'
        }]
      }
    }
  },
  created () {
    this.getCateList()
  },
  computed: {
    cateId () {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  },
  methods: {
    //   获取所有的商品分类列表
    async getCateList () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品数据列表失败！')
      }
      this.cateList = res.data
    },
    //  级联选择器变化 触发的函数
    handleChange () {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    //  Tab离开前钩子函数
    beforeTableave (activeName, oldActiveName) {
      // console.log('即将离开的标签页名字是' + oldActiveName)
      // console.log('即将进入的标签页名字是' + activeName)
      console.log(this.$http.defaults.baseURL)
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类')
        return false
      }
    },
    //  Tab 被选中时触发
    async tabClicked () {
      // console.log(this.activeIndex)
      // 访问的是动态参数面板
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: { sel: 'many' }
        })
        // console.log(res)
        if (res.meta.status !== 200) {
          return this.$message.error('获取动态参数列表失败')
        }
        // 字符串转成数组
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableData = res.data
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: { sel: 'only' }
        })
        // console.log(res)
        if (res.meta.status !== 200) {
          return this.$message.error('获取静态属性列表失败')
        }
        this.onlyTableData = res.data
        console.log(res)
      }
    },
    //  图片预览事件
    handlePreview (file) {
      this.previewPath = file.response.data.url
      this.previewVisible = true
      console.log(file)
    },
    //  处理移除图片的事件
    handleRemove (file) {
      // 1：获取将要删除的图片的临时路径
      const filePath = file.response.data.tmp_path
      // 2：从Pics数组中，找到这个图片对应的索引值
      const i = this.addForm.pics.findIndex(x => x.pic === filePath)
      // 3: 调用数据的splice方法，把图片信息对象从pics数组中移除
      this.addForm.pics.splice(i, 1)
    },
    //  上传成功的钩子函数
    handleSuccess (response) {
      console.log(response)
      // 拼接得到 一个图片信息对象
      const picInfo = { pic: response.data.tmp_path }
      // 将图片信息对象push到pics数组中
      this.addForm.pics.push(picInfo)
    },
    //  添加商品提交
    addGoods () {
      this.$refs.ruleFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.error('请填定必要的表单项')
        }
        //  执行添加的业务
        //  API参数要求，将数据转成字符串
        // 进行深copy lodash cloneDeep(value)
        const form = _.cloneDeep(this.addForm)
        console.log(form)
        form.goods_cat = form.goods_cat.join(',')
        //  处理动态参数
        this.manyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })
        //  处理静态属性
        this.onlyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        console.log(form)
        // 发起商品添加提交
        // 商品的名称必须唯一 TODO:注意参数
        const { data: res } = await this.$http.post('goods', form)
        console.log(res)
        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败')
        }
        await this.$message.success('添加商品成功')
        this.$router.push('/goods')
      })
    }
  }
}
</script>

<style lang="less" scoped>
.el-checkbox {
  margin: 0 10px 0 0 !important;
}

.previewImg {
  width: 100%;
}
</style>
